Window-ventilator



(No Model.)

J. P. DOHNEY.

WINDOW VENTILATOR.

No. 350,582. Patented 001:. 1 2, 1886 N. PETERS Pholo-Lllhugnbher. Wa'shingiun, D. C.

' sorted into a groove in the usual manner. This 1 UNITED STATES PATENT Frrcnx JOHN P. DOHNEY, OF ENGLEWOOD, ILLINOIS.

WINDOW-VENTILATOR.

triPECiEl-ICATION forming part of Letters Patent No. 350,582, dated October 12, 1886.

Application filed April 2 1886. Serial No. 200,387.

To @ZZ whom it may concern.-

Be it known that I, JOHN P. DOHNEY, a citizen of the United States of America, residing at Englewood, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in WindowVentilators, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention has for its object to provide a ventilator that either may form the lower bar of the window-sash, or that may be built into the wall below the window-sill to be fixed and permanent, or that may be made portable and detachable for placing it between the sill and sash of the window, and that can be regulated to either draw foul air from the room or to supply fresh air, or both, as may be desirable; and for that purpose my invention consists of the novel devices and combinations of devices hereinafter described and specifically claimed.

In the accompanying drawings, Figure 1 represents an elevation, Fig. 2 a longitudinal vertical section, and Fig. 3 a transverse vertical section, of the ventilator as arranged within the lower sashbar.

Corresponding letters in the several figures of the drawings designate like parts.

A denotes the ventilator-casing, which, as shown in Fig. 3, may be part of the lower bar of the window-sash, with the glass plate a. in-

casing is divided by two partitions, 1), into three chambers, O, D, and D, and each such chamber has an opening, 0, d, and d, commu nicating with the outdoor atmosphere and covered with a wire screening, 0. The central chamber, 0, also has an open nozzle, E, to its top and exterior of the window-glass, and it has an interior opening that can be closed by a trap-door, F, suspended on hinges f and provided with turn-lateh g. This door F,

, when opened, will be sustained 011 any angular position by a toggle-joint consisting of rigid standard 71 and of links i and j, the latter hinged to the upper inward edge of the trapdoor, and all the pivotal joints of the several parts tightened enough to provide snfficient friction for holding the door on any desired elevation to which it may be opened; but

(No model.)

this toggle-joint arrangement may be left out, and the hinges f may be made to provide sufficient friction for holding the door opened. A diaphragm, K, placed 011 an incline and extending into nozzle E, divides the chamber 0 and prevents a direct admission of air through opening 0 into the room. The chambers D and D communicate each with the inside of the room through an opening, m, that can be closed by a swiveled cover, a. A constant circulation of air passing from opening 0 through nozzle E outside of the window-glass will create. a suction for producing a draft through the opening from under trap-door F, when raised, which draft can be regulated by opening such door F more or less, and it is provided for exhausting the foul air from the room, while through openings (1 and m fresh air is admitted into the room, that can be regulated by covers m, The diaphragm K, being in contact with the warm air from the room on one side, will warm the air coming in contact with it on the other side, which, thereby becoming lighter, will rise, and thus create circulation, as above stated. A ventilator thus arranged within the window-sash or under the window-sillwill not only take up no extra room, but is also always in position for immediate use, is in the proper place most desirable to have it, and will ventilate without causing an unpleasant direct draft of air. g

In place of trap-door F any other kind of door, gate, or register may be applied for closing or regulating the air-outlet.

What I claim is 1. In a window-ventilator, the chamber 0, with nozzle E, diaphragm K, opening 0, and trap-door F, all substantially as described, for the purpose specified.

2. In a window-ventilator, the chamber 0, diaphragm K, the wall of said chamber G be ing provided with an opening, 0, communicating with the exterior atmosphere, and an inward opening closed or regulated by a door or gate, all substantially as and for the purpose set forth.

8. A window-ventilator arranged within the lowersash-bar and consisting of chambers D, having'ian exterior opening, (Z, and a smaller interior opening, m, substantially as set forth.

4. A window-ventilator arranged within the lower saslrbar and consisting of chambers D, 6. Awindow-vcntilator consisting of chamhaving an exterior screen-covered opening, d, ber O, with nozzle E, diaphragm K, opening 0, and a smaller interior opening, m, provided and door F, in combination with chambers D, with covers a, substantially as set forth. having openings (1 and m, the whole being coni 5 5 5. The combination, with the lower sash structed and arrangedsubstantially as set forth. bar or stile of a Window-sash, of a ventilator In tcstimonywhercof Iai'fix my signature in. secured in said lower sash bar or stile, conpresence of two Witnesses.

sisting of chamber O,'\Ylth nozzle E, diaphragm. J OH N P. DOHNEY. K, opening 0, and door F, having toggle joint Vitnesses:

10 h i all constructed and arranged substan- ANTON SGI-IOENINGER,

tially as described, to operate as specified. JOHN W. Vrnss. 

